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Discussion Starter #1
A 275/40-17 in the rear on the stock 8.5" wheel or in a 9" wide wheel. 9" looks like the max width that would fit in the rear. Then the front would need to be A 245/40-17". I like the look of the stock wheels that the 2002 came with. If a set were chromed that would be the be the best for me. Anyone try these sizes?
 

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It all depends on the offset of the wheel for tire fitment. I ran AMG wheels that were 9.5" in the rear with a 275/40 tire offset of 20, with the car on lowering springs, and i had rubbing issues with the very edge of the tread and the fender, when the springs would flex. i then had my fenders rolled, and only had rubbing issues when the car was loaded down and the springs flexed, but at that point it was only slightly rubbing.
 

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Discussion Starter #3
I'll be staying with the stock spRings so it sounds like what I want to do will work. I just have to,check the wheel/ tire vendors to get the max width with the rear 8.5" and the 7.5" I already have. Stock rears are 24.71 in diameter. A 275/40 is 25.66" in diameter, any computer issue with tire diameter? A 245/40 has a tire diameter of the for mentioned 24.71". IF the 275 comes in a 35 series the diameter would drop,to a 24.57" diameter, a better match with the considered 245 front tire. I know there are other factors I will,have to,deal,with but this is a start. Anyone else with wider than stock rubber who can share their experience is welcome to add to what we have here so far, Mark
 

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A 275/40-17 in the rear on the stock 8.5" wheel or in a 9" wide wheel. 9" looks like the max width that would fit in the rear. Then the front would need to be A 245/40-17". I like the look of the stock wheels that the 2002 came with. If a set were chromed that would be the be the best for me. Anyone try these sizes?
No, they will rub.

255/40/17 (25" diameter) fits in the rear. I had to roll the fender lip the keep 255/50/16 drag radials (26" diameter) from rubbing.
 

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Discussion Starter #6
My '02 has a factory fender roll on all 4 corners, I have to say I am confidant now with the stock AMG wheels the 245's on the back now will fit the stock front rims and the 275/40 would be fine in the rear, on the outer. Edge anyways, I have at least 2" from tire to fenderwell, would have to see the inside. Thanks all. Mark
 

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:smile:Too BIG or too SMALL are equally bad and don't look right to me. The SLK is too classy a car to put bigger tires on. Stay with the factory spec size and you won't go wrong. Nothing wrong with going from 17" to 18" or 19" wheels with factory spec tires on the 18" wheels or 235x35x19" front & 265x30x19" tires on 19" wheels. Just my opinion.
 

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My '02 has a factory fender roll on all 4 corners
I don't know what you mean. If it's "factory", it's the same as all other R170 SLKs.

anyways, I have at least 2" from tire to fenderwell, would have to see the inside. Thanks all. Mark
That is when the car is sitting flat. When the suspension is compressed the tire will rub the fenderwell toward the top-front.
 

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Discussion Starter #9
"Factory" was meant to be sarcasm. Really though all 4 fenders are rolled and if they are not all that way then mine is an anomaly. The car is not modded in any way so why rolled? Tires are something that will be addressed down the road and at that.time I will go as wide as will fit on the stock rims as I really like the style though I would prefer chrome, dating myself there.
I agree with Don, -1-, the tire(s) chosen would need to have a factory look to them and any extra width could not be outboard of the body at all. Mark
 

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Discussion Starter #11
I'll see what I can do as I am technologically iliterate. Can a cell phone post the pic once I take the picture or do I need another device? I guess you don't think I don't know what a rolled lip would feel or look like, fair enough, I will try, remember this is my first cell phone, 4 months old whereas I am 739 months old!
 

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Discussion Starter #13
I would have to research but lawheelreplicas.com sells some fairly light wheels in a 9" x 17"wheel for mustangs, vettes and some others at s good price, about $100. Each shipped, but I really like the stock rims, just could cost the same or mote to have them refurbished as to buy a new wheel.
 

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I guess you don't think I don't know what a rolled lip would feel or look like, fair enough,
I just don't think we're speaking the same language. A picture is worth 1000 words. The fenders all have a a flared wheel well opening from the factory, but when people talk about "rolled fenders" they are usually talking about increasing the clearance from stock. I had to lightly roll the inner fender lip to keep 255/40/17s from rubbing when the suspension was compressed with a static camber of -0.6 degrees. A friend of mine tried and gave up on 275s under a SLK32 AMG. I have had 6 pairs of 5 types of tires in 3 sizes on the rear of my SLK32 AMG, so I've been down this road.
 

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Discussion Starter #16
Taking a pic would be difficult with the wheel on. They are not rolled all around, just about 7-8" from center. I"ll try for a pic again.
Is there anyone near Punta Gorda Florida who could help with a NeedsWings dcai install? I can get to the new ps cooling line but need help changing it and removing the old one. S
Again, i"ll try for a pic.
 

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Discussion Starter #18
I ended up going with a 255/40-17 in the rear and stock size in the front, 225/45-17's. However I also used TOYO PROXES R888 road race tires. They are known for being wide for their rated size. Both the front and rear are very close to 25" in diameter. Their UTOG rating is 100 so I am not expecting a lot more than 6 months out of $1000. worth of tires, a birthday gift to myself. These tires STICK! Both in curves and in a straight line.
Before I got new tires I could brake torque up to say 1400rpm and launch, it looked like the space shuttle, in comparison of course. Smoke rose to a height of the electric pole wires and followed the car for as long as they spun, about 30-35' before they started to hook and stop the squeel and spin. I believe tthey were BF Goodrich KDW's and worthless for any type of racing except while on a roll which is what most SLK owners likely do anyways so I guess for them just about any tire would do. I get my work done at Kesatie Motorsports in Sarasota, Florida and 95% of the cars at that shop run Mickey Thompsons in the rear and something similar in the front. A popular combo is the NITTO 555R in the rear and the NITTO 555's up front. If you make that kind of power you had better put it to use.
If you are simply looking at size you can get away with a 255 in the rear. Most important is to get tires that have a very close to stock diameter. I would be more concerned about the diameter of the tires rather than the width because the width is limited by wheel size and the room that is physically available.
So you have a few factors to keep in ,mind.
1. Cost: I had the cash to spend on 6-7 month tires, ONCE!
2. Cost again: This will take in many factors, like a UTOG around 500 or higher, if you drive in the rain(I don't)
3. Size: Stay within the stock diameter by .5"
Not much to play with in width for a reasonable cost. With stock wheels, close to stock widths, very close. If TOYO made a 265 I think I could have run it if it fit the 8.5" width rear tire. I am one guy who thinks that 17" is enough diameter so 18's or a split like 18"/19" is out for me.
So look at the cash issue, stock wheels(?) wear rating(UTOG) and traction. Rating of AA is what I would go for if you can find such in a regular rubber tire and not need to go to a "R" rated tire as I did intentionally. "R" compound tires are for Race but they are almost all are D.O.T. rated. Be careful if you go with an R rated tire for the first time on wet roads. Start slow and get the feel, where they may start to give away, good to know:)
 

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I recently replaced my tyres and rears were a higher profile than standard (they were on special). Now the cruise control won't engage above 70km/h :-(
 

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